The fancy footwear designer, who believes both labels are causing consumer confusion, said:

"I have the biggest respect for the house of Yves Saint Laurent. Having discussed the matter with them and not been able to reach an agreement, we have had to take this to court. My company has a trademark on the red sole and if we don't enforce it this would leave the door open for other brands to copy us while jeopardizing the identity of the Louboutin red sole. No one before me has ever used a colored sole to define a brand's identity. The red sole has become widely recognized as the distinct sign of my brand in the eyes of women all over the world."

If that's what you believe, monsieur, don't you think they'd be able to tell the difference? Have a little faith in your clientele!

After filing a lawsuit against Yves Saint Laurent for infringing on his trademark red soles, Christian Louboutin is now going after Carmen Steffens for the same exact thing. But unlike YSL, the Steffens is ready to throw down in court.

In a statement released on Monday, the Brazilian company thinks it's "surprising that another brand is trying to reserve the rights to any color. The tones are not the same, and, as catalogs dating from 1996 can prove, Carmen Steffens shoes contain soles of all colors, including red."

Their international development director, Gabriel Spaniol, added:

"We are ready to provide unassailable evidence that we have been using colored soles, especially red, before Mr. Christian Louboutin popularized his."